package com.sky.service.impl;


import com.sky.dto.GoodsSalesDTO;
import com.sky.entity.OrderDetail;
import com.sky.entity.Orders;
import com.sky.mapper.OrderMapper;
import com.sky.mapper.UserMapper;
import com.sky.service.ReportService;
import com.sky.entity.Orders;
import com.sky.mapper.OrderMapper;
import com.sky.service.ReportService;

import com.sky.service.WorkSpaceService;
import com.sky.vo.*;

import lombok.extern.slf4j.Slf4j;


import org.apache.commons.lang.StringUtils;
import org.apache.poi.xssf.usermodel.XSSFRow;
import org.apache.poi.xssf.usermodel.XSSFSheet;
import org.apache.poi.xssf.usermodel.XSSFWorkbook;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import javax.servlet.ServletOutputStream;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;
import java.io.InputStream;
import java.time.LocalDate;
import java.time.LocalDateTime;
import java.time.LocalTime;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.stream.Collectors;


@Service
@Slf4j
public class ReportServiceImpl implements ReportService {

    @Autowired
    private OrderMapper orderMapper;
    @Autowired
    private WorkSpaceService workSpaceService;
    @Autowired
    private UserMapper userMapper;
    /**
     * 指定时间区间内的营业额数据
     * @param begin
     * @param end
     * @return
     */

    @Override
    public TurnoverReportVO getTurnoverStatistics(LocalDate begin, LocalDate end) {
        List<LocalDate> dateList = getTime(begin, end);
        //存放每天的营业额
        List<Double> turnoverList = new ArrayList<>();
        for (LocalDate date : dateList) {
            //查询date日期中的营业额，营业额是指已完成订单合计
            LocalDateTime beginTime = LocalDateTime.of(date, LocalTime.MIN);
            LocalDateTime endTime = LocalDateTime.of(date, LocalTime.MAX);
            Map map = new HashMap<>();
            map.put("begin",beginTime);
            map.put("end",endTime);
            map.put("status", Orders.COMPLETED);
            Double turnover = orderMapper.sumByMap(map);
            turnover = turnover == null ? 0.0 : turnover;
            turnoverList.add(turnover);
        }

        log.info("日期：{}",dateList);
        log.info("营业额：{}",turnoverList);
        //封装返回结果
        return TurnoverReportVO
                .builder()
                .dateList(StringUtils.join(dateList,","))
                .turnoverList(StringUtils.join(turnoverList,","))
                .build();
    }

    /**
     * 统计订单详情
     * @param begin
     * @param end
     * @return
     */
    @Override
    public OrderReportVO getOrdersStatistics(LocalDate begin, LocalDate end) {
        List<LocalDate> dateList = getTime(begin, end);
        //每日订单数
        List<Integer> orderCountList = new ArrayList<>();
        //每日有效订单数
        List<Integer> validOrderCountList = new ArrayList<>();
        //订单总数
        Integer totalOrderCount = 0;
        //有效订单数
        Integer validOrderCount = 0;

        for (LocalDate date : dateList) {
            //每天开始时间和结束时间
            LocalDateTime beginTime = LocalDateTime.of(date, LocalTime.MIN);
            LocalDateTime endTime = LocalDateTime.of(date, LocalTime.MAX);
            Map map = new HashMap<>();
            map.put("begin",beginTime);
            map.put("end",endTime);
            Integer totalOrder = orderMapper.selectOrderSum(map);
            totalOrderCount = totalOrderCount + totalOrder;
            map.put("status", Orders.COMPLETED);
            Integer validOrder = orderMapper.selectOrderSum(map);
            validOrderCount = validOrderCount + validOrder;
            validOrderCountList.add(validOrder);
//            Integer validOrder = orderMapper.selectOrderSum(map);
//            validOrderCount = validOrderCount + validOrder;
//            validOrderCountList.add(validOrder);
//            map.put("status", Orders.COMPLETED);
//            Integer totalOrder = orderMapper.selectOrderSum(map);
//            totalOrderCount = totalOrderCount + totalOrder;
            //
            orderCountList.add(totalOrder);
        }
//订单完成率
        Double orderCompletionRate = (double) validOrderCount/totalOrderCount;
        return OrderReportVO
                .builder()
                .dateList(StringUtils.join(dateList,","))
                .orderCountList(StringUtils.join(orderCountList,","))
                .validOrderCountList(StringUtils.join(validOrderCountList,","))
                .totalOrderCount(totalOrderCount)
                .validOrderCount(validOrderCount)
                .orderCompletionRate(orderCompletionRate)
                .build();
    }

    /**
     * 获取指定时间区间内的每一天
     * @return
     */
    public List<LocalDate> getTime(LocalDate begin, LocalDate end){
        List<LocalDate> dateList = new ArrayList<>();
        dateList.add(begin);
        while (!begin.equals(end)){
            //计算指定日期的后一天对应的日期
            begin = begin.plusDays(1);
            dateList.add(begin);
        }
        return dateList;
    }

    @Override
    public SalesTop10ReportVO getSalesTop10Report(LocalDate begin, LocalDate end) {
        String nameTop = "";
        String numberTop = "";
        //获取指定时间内的订单
        List<Orders> ordersList = orderMapper.getSalesTop10Orders(begin, end);
        for (Orders orders : ordersList) {
            //获取订单详情
            List<OrderDetail> orderDetaillist = orderMapper.getByOrdersId(orders.getId());
            List<GoodsSalesDTO> top10 = orderMapper.getTop10(orderDetaillist);
            //获取销量前十的菜品名称和销量
            nameTop = top10.stream().map(GoodsSalesDTO::getName).collect(Collectors.joining(","));
            numberTop = top10.stream().map(GoodsSalesDTO::getNumber).collect(Collectors.joining(","));
        }
        SalesTop10ReportVO salesTop10ReportVO = new SalesTop10ReportVO();
        salesTop10ReportVO.setNameList(nameTop);
        salesTop10ReportVO.setNumberList(numberTop);
        return salesTop10ReportVO;
    }
    /**
     * 导出运营数据报表
     * @param response
     */
    public void exportBusinessData(HttpServletResponse response) {
        //1. 查询数据库，获取营业数据---查询最近30天的运营数据
        LocalDate dateBegin = LocalDate.now().minusDays(30);
        LocalDate dateEnd = LocalDate.now().minusDays(1);

        //查询概览数据
        BusinessDataVO businessDataVO = workSpaceService.getBusinessData(LocalDateTime.of(dateBegin, LocalTime.MIN), LocalDateTime.of(dateEnd, LocalTime.MAX));

        //2. 通过POI将数据写入到Excel文件中
        InputStream in = this.getClass().getClassLoader().getResourceAsStream("template/运营数据报表模板.xlsx");

        try {
            //基于模板文件创建一个新的Excel文件
            XSSFWorkbook excel = new XSSFWorkbook(in);

            //获取表格文件的Sheet页
            XSSFSheet sheet = excel.getSheet("Sheet1");

            //填充数据--时间
            sheet.getRow(1).getCell(1).setCellValue("时间：" + dateBegin + "至" + dateEnd);

            //获得第4行
            XSSFRow row = sheet.getRow(3);
            row.getCell(2).setCellValue(businessDataVO.getTurnover());
            row.getCell(4).setCellValue(businessDataVO.getOrderCompletionRate());
            row.getCell(6).setCellValue(businessDataVO.getNewUsers());

            //获得第5行
            row = sheet.getRow(4);
            row.getCell(2).setCellValue(businessDataVO.getValidOrderCount());
            row.getCell(4).setCellValue(businessDataVO.getUnitPrice());

            //填充明细数据
            for (int i = 0; i < 30; i++) {
                LocalDate date = dateBegin.plusDays(i);
                //查询某一天的营业数据
                BusinessDataVO businessData = workSpaceService.getBusinessData(LocalDateTime.of(date, LocalTime.MIN), LocalDateTime.of(date, LocalTime.MAX));

                //获得某一行
                row = sheet.getRow(7 + i);
                row.getCell(1).setCellValue(date.toString());
                row.getCell(2).setCellValue(businessData.getTurnover());
                row.getCell(3).setCellValue(businessData.getValidOrderCount());
                row.getCell(4).setCellValue(businessData.getOrderCompletionRate());
                row.getCell(5).setCellValue(businessData.getUnitPrice());
                row.getCell(6).setCellValue(businessData.getNewUsers());
            }

            //3. 通过输出流将Excel文件下载到客户端浏览器
            ServletOutputStream out = response.getOutputStream();
            excel.write(out);

            //关闭资源
            out.close();
            excel.close();
        } catch (IOException e) {
            e.printStackTrace();
        }

    }
    @Override
    public UserReportVO getuserStatistics(LocalDate begin, LocalDate end) {
// 存放从begin到end之间每天的日期
        List<LocalDate> dateList = new ArrayList<>();
        dateList.add(begin);
        while (!begin.equals(end)){
            begin = begin.plusDays(1);
            dateList.add(begin);
        }
// 存放用户总量
        List<Integer> totalUserList = new ArrayList<>();
// 存放每天新增用户量
        List<Integer> newUserList = new ArrayList<>();

        for (LocalDate date : dateList) {
            LocalDateTime beginTime = LocalDateTime.of(date, LocalTime.MIN);
            LocalDateTime endTime = LocalDateTime.of(date, LocalTime.MAX);

            Map map = new HashMap<>();
            map.put("end",endTime);
// 总用户数量 select count(*) from user where creat_time <
            Integer totalUser = userMapper.countMap(map);
            map.put("begin",beginTime);
// 新增用户数量
            Integer newUser = userMapper.countMap(map);
            log.info("newUser:{}",newUser);
            totalUserList.add(totalUser);
            newUserList.add(newUser);
        }
        return UserReportVO
                .builder()
                .dateList(StringUtils.join(dateList,","))
                .newUserList(StringUtils.join(newUserList,","))
                .totalUserList(StringUtils.join(totalUserList,","))
                .build();
    }
}
